"One thing [the ASADA investigation] has done for us is brought us all together. It might not have looked like it today, but it really didn't work for us.

"A big thing today was [Collingwood was] just first to the ball, we were second all day. Today it just wasn't there, it was really disappointing.

"When there's no pressure coming into the forward line it makes it really tough. When you're playing on good forwards like Cloke, it's hard."

Essendon's sorry return in attack was shared across seven players in the goals department.

The result puts Collingwood up to sixth, above Richmond on percentages, and immediately below the Bombers on the competition ladder.

Collingwood's Sidebottom said it was about time the Magpies put together a four-quarter performance against a heated rival.

"Internally we're still confident [of our finals chances], I suppose up to date we havent played our best footy but it just shows when we can gel together for four quarters we can match it with anyone," he told Grandstand.

"We go in with the same mindset: play your role, beat your opponent and I think we did that today.

"I suppose we're in a good position. When blokes go down, there's guys in the VFL knocking on the door to get their chance.

SCOREBOARD: ADE v POR

15.13 (104)

17.5 (107)

Four unanswered goals in the final eight minutes, including two in the final 90 seconds, saw Port Adelaide steal Showdown bragging rights from the Crows with a four-point win on Sunday evening.

At Football Park, a lucky bounce turned the tide the Power as they hit four goals without response in the dying stages of the derby clash with Adelaide.

With eight minutes remaining, Robbie Gray and Chad Wingard kicked majors to draw Port within eight points of the Crows.

Angus Monfries then broke forward and his punt looked destined for a behind, but a sharp bounce off the turf saw the ball deflect in for a goal to put Port just two points behind with a minute to play.

Monfries then found himself free on the right flank to boot a long bomb into the area for Wingard to rise highest, mark, and then kick a dramatic winner for the Power.

The Crows had led by seven points at quarter-time, but the game looked to be headed the Power's way when they kicked seven goals in the second period to lead by 21 points at the long break.

But Adelaide roared back with seven goals to Port's two in the third quarter, before kicking another six in the last period as they looked to revive a mediocre season.

But between Gray's goal on the 20 minute mark and Wingard's winner 10 minutes later, the Power smashed home 24 uninterrupted points to snatch an improbable win from their rivals.

Wingard finished the match with five goals for Port, while Kane Cornes handed out 31 disposals.

Patrick Dangerfield and Lewis Johnston both kicked four for Adelaide. Brad Crouch led the possessions count for the Crows with 28 touches, while also tallying up six marks.

Carlton's loss to Fremantle means Port Adelaide has put eight points between it and its nearest rival for eighth place, while Adelaide remains in 13th spot and will miss the AFL play-offs.